Valve tool



VALVE TOOL Filed March 16, 1933 2 Sheets-Sheet 2 Inventor Ba/71g MKenna QMQOi-ih A lforney Patented Dec. 12, 1933 iVALVE TOOL --Barney McKenna; Hammond, 1nd.

'Application'March 16, 1933. .jSerial' No. 661,168 W .1 6 Claims.

This. invention relates. to :an-appliance which may be referred to as having reference toiautomotive; repair practice, and it has more specific relation to a'mechanical contrivance in the form of a simple and economical tool constructed for refacing-thevalve andreseating motor blocks'in one operation, without removing valves from the motor.

1 In carryingthevinventive conception-into practice I have evolved and produced a systematic arrangement of 'mechanical details. assembled in an orderly manner and capable of. practical and -of practicaluse "for-refacing valves after thesame efficient use; the construction being such as to accomplish the. simultaneous refacing and reseatingoperation above referred to and-being capable have been removed from the motoror reseating the motor blockaftertheyalves have been removed from said block.

Briefly stated, the form'of the invention which i Ihave adapted totaccomplish my purpose is characterizedvby a rotary propulsion shaftwith which .,a suitable source of power is connected, said shaft .being constructed; to accommodate ,a pluralityv of circumferentially spaced adjustably mounted abrasive equipped parts susceptible of a, single.v

.. and double; grinding operation.

The specific elementsemployed in thisunique structural organization will become more; readily apparent fromthe. following descriptionand .drawings.

In the drawings:

Figure 1 is a.;view in section showing the valvegrinding tool and the manner in' which it is "associated with a mushroom typ valve.

Figures 2, 3 and 4 are sections on the line 22, 33 and 44 respectively of Figure 1.

Figure 5 is a detail sectional view of the adjustable means for regulating the cutter.

Referring now to the drawings in detail, and to Figure 1 in particular, it will be observed that the numeral 6 designates a mushroom valve of the type having a centering depression.

The rotary operating shaft of the improved grinding tool is generally denoted by the numeral 7 and is made up of an upper cylindrical screwthreaded portion 8 and a lower enlarged hexagonal body portion 9. In this bottom this portion 9 is formed with a socket containing a spring 10 which serves to project a pointed pilot pin 11 to allow the pin to be seated in the depression in the valve 6 for guidance purposes.

The body 9 is formed with longitudinally disposed slots 12 arranged at circumferentially abrasive or grindingblock 1'7.

includes. a stem portionl8-and a substantially obtusef portion 19, the terminal of which is bifur- ,catedto permit the furcations to function as and elevation spaced points. The drive device embodies a universal joint 13-made .up of-suitably constructed and-, mated sections, withv one section provided .witha tang; lito. accommodate a chuck 15 of suitable construction from which the power is derived for rotating the complete shaft 7 and its universal joint drive 13.

In accordance with the inventive conception I provided three distinguishable grinding devices,

these being arranged radially with respect to the shaft and at circumferentially spaced points,

preferably one hundred and twenty degrees apart.

Each grinding or abrasive device is the same in construction and a description of one will sufiice for all. I therefore direct attention toFigure 1 wherein one complete device is illustrated.

In the first place, it embodiesa substantially l -shaped adapter element indicated at 16 which is. constructed .to accommodate the elongated This element 16 guides to straddle the stem of the valve. Particular attention is invited to the fact that the abrasive block 17 is so fitted in the obtuse por- .tion 19 ,as to protrude'on' opposite sides thereof .whereby to enable it to have theduplex action vof-tsimultaneously grinding thevalve 6 and the valve seat in the motor block (not shown).

It will be'observed that the part 18 of the v"abrasive adapteris joined by connector links 21 .to the body 9, the. inner ends of'the links 21 gbeing pivoted in theadlacent slot. 12, with their outer ends pivotally jointed to the adjacent end portions of the part 18. The part 18 is also partly maintained in position by a pivotally mounted adjusting link 22 whose upper end is pivoted between a pair of cars 23 on the longitudinally adjustable annulus or collar 24.

' At this time I invite attention to Figure 5 where it will be observed that this collar is operatively connected with an adjusting nut having knurled plate finger grip and a sleeve nut 26. This sleeve nut is internally and externally screwthreaded, the internal threads engaging the threaded shank 8 and the external threads serving to accommodate a retention nut 27. Thus the collar 24 is loosely confined between the nut 2'7 and the plate 25 to permit the requisite freedom of action and adjustment.

Under this arrangement the various abrasive grinding devices may be simultaneously raised and lowered to dispose the abrasive block 17 in the proper position with respect to the surfaces adapted to be ground. In practice, the pilot pin 11 is seated in the existing centering depression of the valve 6 as shown in Figure 1 and the chuck 15 of the source of power (not shown) is attached to the stem 14. The universal joint drive 13 permits the required relative position of power with respect to the shaft 7 to provide for accommodation and eflfectiveness in operation and use.

The abrasive block devices may be adjusted for single action in grinding the bevelled edge of a mushroom valve or may be interposed between the valve and the seat in the motor block (not shown) without removing the valve, simultaneously reconditioning both the surfaces. Consequently it is possible with this device to grind the valve and motor block without removing the valve or to take out the valves and grind them or to reseat the motor block after the valves have been removed.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had. There fore, a more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

I claim:

1. In a double and single acting resurfacing tool of the class described, a rotary propeller shaft, a valve grinding device embodying a substantially L-shaped adapter including a portion disposed alongside of and in substantial parallelism to the body portion of the shaft including an obtuse angular lower end portion having a slot and having its extremity bifurcated, the furcations constituting guides to straddle a valve stem and an abrasive block mounted in said slot and having opposite edge portions protruding beyond the slots for double acting resurfacing work, together with an adjustable and operating connection between said adapter and shaft.

2. In a tool of the class described, a rotary operating shaft having a screw-threaded shank and a body portion, said body portion being formed in one end 'with, a socket, a springpressed pilot pin arranged in said socket, a power coupling device having universal connection with the screw-threaded shank and. valve grinding means associated withsaid shank, and includ-' nut, a retention nut carried by the external threads and a knurled finger adjusting disc.

3. In a valve grinder of the class described, a rotary propeller shaft having a polygonal body portion provided with a spring pressed pilot pin and a longitudinal slot, together with a screwthreaded shank, and an adjusting nut mounted for adjustment on said shank, a collar mounted loosely in said nut, a substantially L-shaped adapter device including an abrasive resurfacing element, a link connecting said device with said collar and additional connector links between said device and the slotted portion of said body.

4. A tool of the class described comprising a shank having a part at its lower end for engaging a part of a valve, a carrier member having a straight arm paralleling a part of the shank and a diagonally arranged arm, a grinder element carried by the last mentioned arm, links each having one end pivotally connected to the straight arm and its other end to a part of the shank, a member adjustable for vertical movement on the shank and a link pivoted to said member and to the upper end of the straight arm. 7

5. A device of the class described comprising a shank having a threaded portion, a pin at the lower end of the shank for engaging a recess in the upper face of a valve, a carrier member including a straight arm paralleling a part of the shank and a diagonally arranged arm, an abrasive block attached to the diagonal arm and projecting from opposite sides thereof, links pivotally connected to the straight arm and to parts of the shank, a nut threaded on the threaded part of the shank, a collar rotatably arranged on the nut and a link connecting the collar with the upper end of the straight arm.

6. A device of the class described comprising a shank having a threaded portion, a pin atthe lower end of the shank for engaging a recess in the upper face of a valve, a carrier member including a straight arm paralleling a part of the shank and a diagonally arranged arm, an abrasive block attached to the diagonal arm and pro jecting from opposite sides thereof, links pivotally connected to the straight arm and to parts of the shank, a nut threaded on the threaded part of the shank, a collar rotatably arranged on the nut, a link connecting the collar with the upper end of the straight arm, the lower end of the diagonally arranged arm having a recess therein for receiving portion of the shank of a valve.

BARNEY McKENNA. 

